The Maid

Kang Hana, a former girl group trainee, gives up everything and decides to have her baby after an unexpected pregnancy. She temporarily leaves the baby in a baby box until she can save up for a housing deposit. But she then finds out that a famous actor-director couple has adopted her child. Determined to get her baby back, she becomes the babysitter in their home. But then she discovers that the wife, Angela, is transfusing the baby's blood—almost like a vampire. Kang Hana decides she must kill her.

(Source: Naver Corporation, translated)